What causes bathroom sink clogs?

Bathroom sinks clog almost exclusively from hair and soap scum. Unlike kitchen sinks (grease and food), bathroom drains collect hair that tangles around the stopper and builds up over time. The fix is mechanical — remove the hair.

How do I unclog a bathroom sink without a plunger?

Use a plastic drain snake or hair removal tool — insert it into the drain, rotate to catch hair, and pull it out. This clears most bathroom clogs in under 5 minutes and costs about $5.

Does baking soda and vinegar unclog bathroom drains?

For odours and light buildup, yes. For a genuine hair clog, no — the chemical reaction doesn't dissolve hair. Manual removal with a drain snake is faster and more effective.

How do I prevent bathroom sink clogs?

Use a drain hair catcher over the drain opening and empty it after every use. This is the single most effective prevention — no chemicals needed.

How to Unclog a Bathroom Sink

Bathroom sink clogs are almost always hair and soap scum wrapped around the drain stopper. You don't need chemicals or a plumber — here's how to clear it.

Why Bathroom Sinks Clog

Bathroom drains are different from kitchen drains. The main culprit isn't grease — it's hair. Strands wrap around the pop-up stopper, trap soap scum, and slowly block the pipe. It builds up faster than you'd expect, especially in households with longer hair.

What You Need

A drain snake or hair removal tool — a flexible plastic strip with barbs ($5–$10)
Or a wire coat hanger with the end bent into a small hook
Rubber gloves (optional but you'll want them)
A bin or waste bag nearby

Step 1 — Remove the Drain Stopper

Most bathroom sinks have a pop-up stopper controlled by a lift rod behind the tap. To remove it:

Try pulling the stopper straight up — many lift out without tools
If it won't come out, look under the sink for a horizontal pivot rod that goes through the drain pipe. Squeeze the retaining clip and slide the pivot rod free, then lift the stopper out from above

Once out, clean off the hair and soap scum wrapped around the stopper base. This alone often restores reasonable flow.

Step 2 — Snake the Drain

Even after cleaning the stopper, there's usually more buildup further down the pipe.

Insert the drain snake into the drain opening and push it down 15–25cm. Rotate it slowly — the barbs catch hair and soap residue. Pull out slowly and steadily. Expect to retrieve a significant clump.

Repeat 2–3 times until the tool comes out clean.

Step 3 — Flush with Hot Water

Run the hot tap for 60 seconds to flush any remaining debris through the pipe. Test the drain speed — it should be noticeably improved.

Step 4 — Optional: Baking Soda + Vinegar

To clean residue and remove odours after clearing the hair:

Pour ½ cup of baking soda down the drain
Follow with ½ cup of white vinegar
Cover the drain opening for 10 minutes
Flush with hot water

This doesn't dissolve hair clogs but is a good finishing step for a clean drain.

If It's Still Slow: Clean the P-Trap

If snaking didn't fully fix it, the clog may be in the P-trap — the U-shaped pipe under the sink:

Put a bucket under the P-trap to catch water
Unscrew the two slip nuts by hand (or with pliers if needed)
Remove the P-trap and clean it out manually
Reassemble and run water to test

Prevent It From Coming Back

A silicone drain hair catcher placed over the drain catches hair before it enters the pipe. Empty it after every use. This is cheaper and more effective than any drain cleaner.

When to Call a Plumber

The clog clears but returns within a few days
Multiple drains in the house are slow at the same time (likely a main line issue)
You smell sewage coming from the drain